<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <button>点击进行加载</button>
    <script type="module">
        // import a from './a.js'
        // import {b} from './a.js'
        // import * as obj from './b.js'
        // console.log(a);
        // console.log(b);
        // console.log(obj.default);


        // 懒加载
        import './a.js'
        document.querySelector('button').onclick = function(){
            import('./b.js').then(b=>{
                console.log(b);
            })
        }
    </script>
</body>
</html>